Observation of the influence of the crystal surface defects on the characteristics of the high energy particle beam deflected with a bent monocrystal

Author

Baranov, V.I. ; Biryukov, V.M. ; Chesnokov, Yu.A. ; Kotov, V.I. ; Tarakanov, M.V. ; Tsarik, S.V.

Author_Institution

IHEP Protvino, Moscow, Russia

Volume

3

fYear

1995

fDate

1-5 May 1995

Firstpage

1949

Abstract

Nowadays bent crystals are widely applied for high energy beam steering. Some problems, like the extraction of particles from a large hadron collider, imply a high perfection of the crystal near-surface layer. In this work we have measured precisely the profiles of the beam bent by crystal, with use of nuclear emulsions. The inefficient layer measured for several crystals is as thick as ≃50 μm. There was observed also a specific mosaics of crystals near the ends, which has led to the angular perturbations of the bent beam exceeding the critical angle of channeling

Keywords

beam handling equipment; beam handling techniques; channelling; particle beam extraction; silicon; Si; bent monocrystal; channeling; critical angle; crystal near-surface layer; crystal surface defects; high energy beam steering; high energy particle beam; nuclear emulsions; Beam steering; Crystals; Grain size; Large Hadron Collider; Nuclear measurements; Particle beams; Performance evaluation; Shape; Silicon; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505417

Filename

505417